spark

spark► NOUN1) a small fiery particle thrown off from a fire, alight in ashes, or caused by friction. 2) a light produced by a sudden disrupted electrical discharge through the air. 3) a discharge such as this serving to ignite the explosive mixture in an internal-combustion engine. 4) a small bright object or point.
5) a small but concentrated amount or trace: a tiny spark of anger.6) a sense of liveliness and excitement.